INFOGRAPHIC

What Is Hypoglycemia?

Reviewed by Claudia Levi, R.N.
March 27, 2025
hypoglycemia noun the medical term for blood sugar levels that are too low

Hypoglycemia is the medical term for having low blood sugar. If you’re having a “low,” doctors might also say you’re in a state of hypoglycemia. This is typically a glucose reading that’s lower than 70 milligrams per deciliter (mg/dL).

Symptoms of low blood sugar include:

  • Feeling shaky, anxious, or irritable
  • Confusion
  • Feeling lightheaded or weak
  • Sweating
  • Going pale
  • Blurred vision
  • Racing heart
  • Hunger and/or nausea

Many factors can lead to low blood sugar levels in type 1 or type 2 diabetes, including:

  • Fasting or not eating enough carbs
  • Diabetes medications
  • Insulin therapy
  • Increased exercise
  • Drinking alcohol
  • Being sick

Low blood sugar levels need immediate treatment. Work with your doctor to come up with the best plan for your diet and physical activity, so your blood sugar levels can stay in a healthier range.